package com.fallsvc.re.networkprogramming.base;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * @auther falls_vc
 * description:
 * @date 2025/10/28  10:15
 */
public class Demo1 {
    public static void main1(String[] args) {
        Map<String,Integer> map = Collections.synchronizedMap(new HashMap<>());
    }
    static class Counter {
        public volatile int count = 0;
        synchronized void increase() {
            count++;
        }
    }
    public static void main(String[] args) throws InterruptedException {
        final Counter counter = new Counter();
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(counter.count);
    }
}
